Porcelain dental components that affect MRI include nickel-cadmium alloy, cobalt-chromium alloy and other magnetic metals, and this porcelain tooth will produce a large golf ball shadow on the MRI image can not be seen clearly. If this kind of crown is located in the lower tooth area, it is far from the brain and will not affect the brain examination; if it is located in the upper tooth area, it will only affect the examination of the maxillary sinus, but ENT doctors often only need CT examination of the maxillary sinus. Therefore, please do not worry too much about the impact of porcelain teeth on MRI. Generally like palladium and silver, gold and platinum and other precious metal porcelain teeth, has no magnetic, on the MRI basically no effect, is also a good choice. Do not necessarily have to choose all-porcelain crowns for restoration.